A new implementation of the Gesture API.

Implemented gestures using gesture events and separate
QGesture/QGestureRecognizer classes.

Reviewed-by: trustme

1 files changed, 125 insertions, 0 deletions

diff --git a/src/gui/kernel/qgesturemanager_p.h b/src/gui/kernel/qgesturemanager_p.h
new file mode 100644
index 0000000000..c61819f5c2
--- /dev/null
+++ b/src/gui/kernel/qgesturemanager_p.h
@@ -0,0 +1,125 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QGESTUREMANAGER_P_H
+#define QGESTUREMANAGER_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qobject.h"
+#include "qbasictimer.h"
+#include "private/qwidget_p.h"
+#include "qgesturerecognizer.h"
+
+QT_BEGIN_NAMESPACE
+
+class QBasicTimer;
+class QGestureManager : public QObject
+{
+    Q_OBJECT
+public:
+    QGestureManager(QObject *parent);
+    ~QGestureManager();
+
+    Qt::GestureType registerGestureRecognizer(QGestureRecognizer *recognizer);
+    void unregisterGestureRecognizer(Qt::GestureType type);
+
+    bool filterEvent(QObject *receiver, QEvent *event);
+
+    // declared in qapplication.cpp
+    static QGestureManager* instance();
+
+protected:
+    void timerEvent(QTimerEvent *event);
+
+private:
+    QMultiMap<Qt::GestureType, QGestureRecognizer *> recognizers;
+
+    QSet<QGesture *> activeGestures;
+    QMap<QGesture *, QBasicTimer> maybeGestures;
+
+    enum State {
+        Gesture,
+        NotGesture,
+        MaybeGesture // this means timers are up and waiting for some
+                     // more events, and input events are handled by
+                     // gesture recognizer explicitely
+    } state;
+
+    struct ObjectGesture
+    {
+        QWeakPointer<QObject> object;
+        Qt::GestureType gesture;
+
+        ObjectGesture(QObject *o, const Qt::GestureType &g) : object(o), gesture(g) { }
+        inline bool operator<(const ObjectGesture& rhs) const
+        {
+            if (object.data() < rhs.object.data())
+                return true;
+            if (object == rhs.object)
+                return gesture < rhs.gesture;
+            return false;
+        }
+    };
+
+    QMap<ObjectGesture, QWeakPointer<QGesture> > objectGestures;
+    QMap<QGesture *, QGestureRecognizer *> gestureToRecognizer;
+
+    QHash<QGesture *, QObject *> gestureTargets;
+
+    int lastCustomGestureId;
+
+    QGesture *getState(QObject *widget, Qt::GestureType gesture);
+    void deliverEvents(const QSet<QGesture *> &gestures, QObject *lastReceiver);
+};
+
+QT_END_NAMESPACE
+
+#endif // QGESTUREMANAGER_P_H